Add 'compile' to the git ignore list.

This is another script generated by the autotools build.

.gitignore

@@ -4,6 +4,7 @@ aclocal.m4
 autom4te.cache
 *.kdevelop.pcs
 *.kdevses
+compile
 config.guess
 config.h
 config.h.in
@@ -49,4 +50,4 @@ silk/float/Release
 silk/float/x64
 src/Debug
 src/Release
-src/x64
\ No newline at end of file
+src/x64