-mdynamic-no-pic for darwin -> 5% speedup patch by (Dieter Shirley <dieters at schemasoft dot com>)

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@1140 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

configure

@@ -96,7 +96,7 @@ Darwin)
 cc="cc"
 v4l="no"
 audio_oss="no"
-CFLAGS="-no-cpp-precomp -pipe -O3 -fomit-frame-pointer"
+CFLAGS="-no-cpp-precomp -pipe -O3 -fomit-frame-pointer -mdynamic-no-pic"
 SHFLAGS="-dynamiclib"
 extralibs=""
 darwin="yes"