Enable UBSAN in CI on my fork

Author: nielsdos

.github/actions/configure-macos/action.yml

@@ -20,6 +20,7 @@ runs:
         ./buildconf --force
         ./configure \
           --enable-option-checking=fatal \
+          --enable-undefined-sanitizer \
           --prefix=/usr/local \
           --enable-fpm \
           --with-pdo-mysql=mysqlnd \

.github/actions/configure-x32/action.yml

@@ -16,6 +16,7 @@ runs:
         export LDFLAGS=-L/usr/lib/i386-linux-gnu
         ./configure ${{ inputs.configurationParameters }} \
             --enable-option-checking=fatal \
+            --enable-undefined-sanitizer \
             --build=i686-pc-linux-gnu \
             --prefix=/usr \
             --enable-phpdbg \

.github/actions/configure-x64/action.yml

@@ -12,6 +12,7 @@ runs:
         ./buildconf --force
         ./configure \
           --enable-option-checking=fatal \
+          --enable-undefined-sanitizer \
           --prefix=/usr \
           --enable-phpdbg \
           --enable-fpm \