Create config.h

Fixes laullon#1. Though I fixed it be rebasing away the mistaken commit that switched the submodule. Then extracted this fix from that commit.

Sorry for the rebase, but it was neater and this project is small.

Author: mxcl

GitX.xcodeproj/project.pbxproj

@@ -835,6 +835,7 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 26FC0A840875C7B200E6366F /* Build configuration list for PBXNativeTarget "GitX" */;
 			buildPhases = (
+				63B0DC1615C9A31500E64679 /* ShellScript */,
 				8D1107290486CEB800E47090 /* Resources */,
 				8D11072C0486CEB800E47090 /* Sources */,
 				8D11072E0486CEB800E47090 /* Frameworks */,
@@ -932,6 +933,19 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
+		63B0DC1615C9A31500E64679 /* ShellScript */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "echo \"#import <unix.h>\" > $SRCROOT/libgit2/src/git/config.h";
+		};
 		D81E15ED121CE83D00269E61 /* Scripting Bridge Header Script  */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;