compile-libvlc: mitigate potentially huge linker options

the script is aggregating every .pc from the contribs, under specific circumstances this may create too many arguments for the linker

the script now removes recurring patterns

-lintl -lintl -lm -lintl -lm -lintl -lintl -lm

becomes:

-lintl -lm

while integrating third party library I ended up with 7k arguments due to .pc inter-dependencies

added 1 commit

• ee31d23f - compile-libvlc: mitigate potentially huge linker options

Compare with previous version

mentioned in merge request !107