update XCode project for 4.5, armv7s, drop armv6

Author: sjlombardo

sqlcipher.xcodeproj/project.pbxproj

@@ -120,7 +120,7 @@
 		08FB7793FE84155DC02AAC07 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0420;
+				LastUpgradeCheck = 0450;
 			};
 			buildConfigurationList = 1DEB91EF08733DB70010E9CD /* Build configuration list for PBXProject "sqlcipher" */;
 			compatibilityVersion = "Xcode 3.2";
@@ -184,6 +184,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				COMBINE_HIDPI_IMAGES = YES;
 				COPY_PHASE_STRIP = NO;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_MODEL_TUNING = G5;
@@ -215,6 +216,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				COMBINE_HIDPI_IMAGES = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				GCC_MODEL_TUNING = G5;
 				HEADER_SEARCH_PATHS = (
@@ -246,7 +248,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				"ARCHS[sdk=iphoneos*]" = (
-					armv6,
+					armv7s,
 					armv7,
 				);
 				"ARCHS[sdk=macosx*]" = (
@@ -269,7 +271,7 @@
 			buildSettings = {
 				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
 				"ARCHS[sdk=iphoneos*]" = (
-					armv6,
+					armv7s,
 					armv7,
 				);
 				"ARCHS[sdk=macosx*]" = (
@@ -288,6 +290,7 @@
 		9069D08C0FCE185A0042E34C /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				COMBINE_HIDPI_IMAGES = YES;
 				COPY_PHASE_STRIP = NO;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_OPTIMIZATION_LEVEL = 0;
@@ -298,6 +301,7 @@
 		9069D08D0FCE185A0042E34C /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				COMBINE_HIDPI_IMAGES = YES;
 				COPY_PHASE_STRIP = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				PRODUCT_NAME = amalgamation;