Made PHP extension compile with openssl by default (#41)

* Made PHP extension compile with openssl

* Use catchsegv to dump a callstack

* Updated to use aws_crt_crypto_share()

* Much faster builds by making cmake parallel if supported

* Make sure all CRT threads shutdown prior to cleanup

* USE_OPENSSL should be the path to openssldir

* Updated to aws-crt-ffi v0.2.4

run_tests

@@ -2,6 +2,11 @@
 
 set -ex
 
+launcher=
+if command -v catchsegv; then
+    launcher=catchsegv
+fi
+
 if [ -z $PHP_BINARY ]; then
     PHP_BINARY=$(which php)
 fi
@@ -10,5 +15,4 @@ if [ ! -d vendor ]; then
     composer update
 fi
 
-$PHP_BINARY -c php.ini vendor/bin/phpunit tests --debug
-
+$launcher $PHP_BINARY -c php.ini vendor/bin/phpunit tests --debug