Compile PHP with freetype support

[gardenia]

No description provided.

[gardenia]

I believe so. The heroku runtime enviornment ships with a libfreetype.so just no headers:

~ $ ls -al /usr/lib/libfreetype.so
lrwxrwxrwx 1 root root 21 2013-07-09 17:06 /usr/lib/libfreetype.so -> libfreetype.so.6.3.22

My approach was to depend on said library as an implicit link and runtime dependency and just supply the headers for the build stage. The only potential downside I see with that is if Heroku modify the version of their runtime libfreetype.so and some core freetype function prototype happens to get removed/changed then there would be a runtime mismatch but that doesn't seem that likely.

I compiled it successfully on Vulcan using vulcan-build-php from scratch and here is the ldd on the resulting php binary:

~ $ ldd /app/vendor/php/bin/php | grep free
libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x00007faf2d678000)

I verified that it works at runtime by running the following:

[iphoting]

@gardenia, thanks for the clarification. I believe this can also help resolve #25.
I'll pull in the patch next week when I return from my vacation.

Once again, thanks for the effort!

[iphoting]

I've recompiled PHP v5.4.17 in my s3 repo with the changes applied in this PR.