Bump version to 0.77

Why:

 * During backup process Termux is being killed in most cases.
 * Backup data is limited to 25 MB.
 * Backup may not be performed/updated in certain cases.

app/build.gradle

@@ -16,8 +16,8 @@ android {
         applicationId "com.termux"
         minSdkVersion 24
         targetSdkVersion 28
-        versionCode 76
-        versionName "0.76"
+        versionCode 77
+        versionName "0.77"
 
         externalNativeBuild {
             ndkBuild {
@@ -125,11 +125,11 @@ clean {
 
 task downloadBootstraps(){
     doLast {
-        def version = 17
-        downloadBootstrap("aarch64", "1846c453e7d4399559683e9a74eb8db048d1e88872668361652752b40ea2f3a2", version)
-        downloadBootstrap("arm",     "2f5a8061a1c13d48b659cb57c3767d59f5151f247ea032e2401135701dbd8058", version)
-        downloadBootstrap("i686",    "ca0e3559c5ac925528a7c8725a83a752ca63d5c1e0ff306e5ecd6ea9dd4c1de5", version)
-        downloadBootstrap("x86_64",  "9de2ac75ed0f3370418d3c55b470c176f69180079ba9461034bc7f6195fc5872", version)
+        def version = 18
+        downloadBootstrap("aarch64", "1a4c08a696d452b58f69102428239ec0c07521c0ca9f48b23ef70ae0e5e3d4f8", version)
+        downloadBootstrap("arm",     "bff11f2c7e9c1055a22fc5f20bb7507b75f6034e0f5d591ec6725b3407981b85", version)
+        downloadBootstrap("i686",    "6fb93020db2807337d82a1537e24612400cacbd10cf4bccaeb0714d51e653da1", version)
+        downloadBootstrap("x86_64",  "a6067e5decc486dcad190c1ed9e15366c798e5e7d9b9b9ee6b4b8231290524c3", version)
     }
 }
 

app/src/main/AndroidManifest.xml

@@ -18,8 +18,7 @@
 
     <application
         android:extractNativeLibs="true"
-        android:allowBackup="true"
-        android:fullBackupContent="@xml/backupscheme"
+        android:allowBackup="false"
         android:icon="@drawable/ic_launcher"
         android:banner="@drawable/banner"
         android:label="@string/application_name"

app/src/main/res/xml/backupscheme.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<full-backup-content>
-    <!-- See https://developer.android.com/training/backup/autosyncapi.html -->
-    <include domain="file" path="home/backup" />
-</full-backup-content>