Modified php building for buggy rhel-8 toolchain

php/php-src#12774
https://sourceware.org/bugzilla/show_bug.cgi?id=23169

Ticket: ENT-12140
Changelog: none.

Author: craigcomstock

deps-packaging/php/cfbuild-php.spec

@@ -34,7 +34,7 @@ fi
   --with-iconv \
   --with-zlib=%{prefix} \
   --with-libmbfl=%{prefix} \
-  --enable-mbstring \
+  --enable-mbstring=shared \
   --enable-sockets \
   --disable-mbregex \
   --without-fpm-user \