Older versions of tar don't support the --strip-components option so
instead of doing 'tar --strip-components=1 -C source', we now just
untar to the tarball's root directory (pjproject-<version>) and
rename that directory to 'source'.
Also fixed an issue where the pjproject source directory is a hard
coded absolute pathname.
ASTERISK-26510 #close
ASTERISK-22480 #close
Change-Id: I9ec92952507a91ff4e4d01e0149e09fd8e8f32b0
* CFLAGS is now properly set when using older gcc.
* All third-party pjproject targets have been removed. This fixes
an issue with older libsrtp in some distros.
* Manually removing the source directory now causes a rebuild.
* EXTERNALS_CACHE_DIR is now properly checked.
* Whitespace fixes.
Change-Id: I98fec6847efc5602a9f41cb95096fd660a49fa60
