Add libgit2.pc to make clean rule.

Signed-off-by: Ingmar Vanhassel <ingmar@exherbo.org>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Makefile

@@ -43,6 +43,7 @@ all:: $(GIT_LIB)
 
 clean:
 	rm -f $(GIT_LIB)
+	rm -f libgit2.pc
 	rm -f src/*.o
 	rm -f tests/*.o tests/*.exe tests/*.toc
 	rm -rf trash-*.exe