Build support-v4 from source with gradle

v7-appcompat can be enabled/used in gradle by changing :support-v4 with
:support-appcompat-v7 in build.gradle and bumping minSdk from 5 to 7

.gitmodules

@@ -22,3 +22,7 @@
 	path = extern/jmdns
 	url = https://gitlab.com/fdroid/jmdns.git
 	ignore = dirty
+[submodule "extern/Support"]
+	path = extern/Support
+	url = https://android.googlesource.com/platform/frameworks/support
+	ignore = dirty

build.gradle

@@ -10,9 +10,14 @@ buildscript {
 def toolVersion = "19.1"
 apply plugin: 'android'
 
+sdkLoc = System.getenv("ANDROID_HOME")
+FileCollection getAndroidPrebuilt(String apiLevel) {
+    files("$sdkLoc/platforms/android-$apiLevel/android.jar")
+}
+
 dependencies {
-	compile files('libs/android-support-v4.jar')
 	compile files('libs/core-3.0.1.jar')
+	compile project(':support-v4')
 	compile project(':extern:AndroidPinning')
 	compile project(':extern:UniversalImageLoader:library')
 	compile project(':extern:MemorizingTrustManager')
@@ -117,3 +122,4 @@ subprojects {
         }
     }
 }
+

extern/Support

@@ -0,0 +1 @@
+Subproject commit 1c086e1e7849c0b3fe31d11ea83d42bd78abcd6d

settings.gradle

@@ -1,5 +1,13 @@
-include ':extern:AndroidPinning',
-    ':extern:UniversalImageLoader:library',
-    ':extern:MemorizingTrustManager',
+include \
+	':extern:AndroidPinning',
+	':extern:UniversalImageLoader:library',
+	':extern:MemorizingTrustManager',
 	':extern:libsuperuser:libsuperuser',
 	':extern:nanohttpd:core'
+
+include ':support-v4'
+project(':support-v4').projectDir = new File('extern/Support/v4')
+
+include ':support-appcompat-v7'
+project(':support-appcompat-v7').projectDir = new File('extern/Support/v7/appcompat')
+