update 3.4 PKGBUILD, use --with-system-libmpdec and --without-ensurepip

git-svn-id: file:///srv/repos/svn-packages/svn@207145 eb2447ed-0c53-47e4-bac8-5bc4a241df78
httpd binary is already installed by 'make install'

git-svn-id: file:///srv/repos/svn-packages/svn@207146 eb2447ed-0c53-47e4-bac8-5bc4a241df78