BuildSystem: Check for alternate openssl packages

OpenSSL is one of those packages that often have alternatives
with later versions.  For instance, CentOS/EL 7 has an
openssl package at version 1.0.2 but there's an openssl11
package from the epel repository that has 1.1.1.  This gets
installed to /usr/include/openssl11 and /usr/lib64/openssl11.
Unfortunately, the existing --with-ssl and --with-crypto
./configure options expect to point to a source tree and
don't work in this situation.  Also unfortunately, the
checks in ./configure don't use pkg-config.

In order to make this work with the existing situation, you'd
have to run...
./configure --with-ssl=/usr/lib64/openssl11 \
    --with-crypto=/usr/lib64/openssl11 \
    CFLAGS=-I/usr/include/openssl11

BUT...  those options don't get passed down to bundled pjproject
so when you run make, you have to include the CFLAGS again
which is a big pain.

Oh...  To make matters worse, although you can specify
PJPROJECT_CONFIGURE_OPTS on the ./configure command line,
they don't get saved so if you do a make clean, which will
force a re-configure of bundled pjproject, those options
don't get used.

So...

* In configure.ac... Since pkg-config is installed by install_prereq
  anyway, we now use it to check for the system openssl >= 1.1.0.
  If that works, great.  If not, we check for the openssl11
  package. If that works, great.  If not, we fall back to just
  checking for any openssl.  If pkg-config isn't installed for some
  reason, or --with-ssl=<dir> or --with-crypto=<dir> were specified
  on the ./configure command line, we fall back to the existing
  logic that uses AST_EXT_LIB_CHECK().

* The whole OpenSSL check process has been moved up before
  THIRD_PARTY_CONFIGURE(), which does the initial pjproject
  bundled configure, is run.  This way the results of the above
  checks, which may result in new include or library directories,
  is included.

* Although not strictly needed for openssl, We now save the value of
  PJPROJECT_CONFIGURE_OPTS in the makeopts file so it can be used
  again if a re-configure is triggered.

ASTERISK-29693

Change-Id: I341ab7603e6b156aa15a66f43675ac5029d5fbde

menuselect/configure

@@ -696,6 +696,7 @@ infodir
 docdir
 oldincludedir
 includedir
+runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -777,6 +778,7 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
+runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE}'
@@ -1029,6 +1031,15 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
+  -runstatedir | --runstatedir | --runstatedi | --runstated \
+  | --runstate | --runstat | --runsta | --runst | --runs \
+  | --run | --ru | --r)
+    ac_prev=runstatedir ;;
+  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+  | --run=* | --ru=* | --r=*)
+    runstatedir=$ac_optarg ;;
+
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1166,7 +1177,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir
+		libdir localedir mandir runstatedir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1319,6 +1330,7 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]