Corrected some missing link in Xcode project

xcode/mruby.xcodeproj/project.pbxproj

@@ -169,10 +169,10 @@
 		8844358915772EF0007F95A4 /* typeerror.rb */ = {isa = PBXFileReference; lastKnownFileType = text.script.ruby; path = typeerror.rb; sourceTree = "<group>"; };
 		8844358F1577301B007F95A4 /* mrbtest */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = mrbtest; sourceTree = BUILT_PRODUCTS_DIR; };
 		8844359A157730DB007F95A4 /* mrbtest.c */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.c; path = mrbtest.c; sourceTree = "<group>"; };
-		88760A9D1575991600113BFB /* mrbc */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.executable"; name = mrbc; path = build/mrbc; sourceTree = "<group>"; };
-		88760B1715769BE400113BFB /* libmruby_core.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; name = libmruby_core.a; path = build/lib/libmruby_core.a; sourceTree = "<group>"; };
+		88760A9D1575991600113BFB /* mrbc */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.executable"; name = mrbc; path = bin/mrbc; sourceTree = SOURCE_ROOT; };
+		88760B1715769BE400113BFB /* libmruby_core.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; name = libmruby_core.a; path = lib/libmruby_core.a; sourceTree = SOURCE_ROOT; };
 		88760B1C15769CEE00113BFB /* mrblib.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = mrblib.c; sourceTree = "<group>"; };
-		88760B1F15769E2D00113BFB /* libmruby.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; name = libmruby.a; path = build/lib/libmruby.a; sourceTree = "<group>"; };
+		88760B1F15769E2D00113BFB /* libmruby.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; name = libmruby.a; path = lib/libmruby.a; sourceTree = SOURCE_ROOT; };
 		88760B2415769E6100113BFB /* mruby */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = mruby; sourceTree = BUILT_PRODUCTS_DIR; };
 		88760B3C15769F3000113BFB /* mirb */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = mirb; sourceTree = BUILT_PRODUCTS_DIR; };
 		88760B7E1576A33100113BFB /* mruby_fw-Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = "mruby_fw-Info.plist"; sourceTree = "<group>"; };