ANDROID: move builds to use gas prebuilts

Completes stage 5 of:
https://android.googlesource.com/platform/prebuilts/clang/host/linux-x86/+/master/BINUTILS_KERNEL_DEPRECATION.md

Bug: 141693040
Test: remove host binutils (easy for cross compiling, hard for host
tools), rebuild multiple configs including cuttlefish configs which rely
on these.
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Change-Id: Ia88f4f6572049c0173742aee95df824c0f31c050
diff --git a/build.config.aarch64 b/build.config.aarch64
index 15d2c0f..db6cb0a8 100644
--- a/build.config.aarch64
+++ b/build.config.aarch64
@@ -2,7 +2,7 @@
 
 CLANG_TRIPLE=aarch64-linux-gnu-
 CROSS_COMPILE=aarch64-linux-androidkernel-
-LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin
+LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gas/linux-x86
 
 MAKE_GOALS="
 Image
diff --git a/build.config.arm b/build.config.arm
index 7f71449..306021e 100644
--- a/build.config.arm
+++ b/build.config.arm
@@ -2,7 +2,7 @@
 
 CLANG_TRIPLE=arm-linux-gnueabi-
 CROSS_COMPILE=arm-linux-androidkernel-
-LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin
+LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gas/linux-x86
 
 MAKE_GOALS="
 Image
diff --git a/build.config.x86_64 b/build.config.x86_64
index 4525549..d14feab 100644
--- a/build.config.x86_64
+++ b/build.config.x86_64
@@ -2,7 +2,7 @@
 
 CLANG_TRIPLE=x86_64-linux-gnu-
 CROSS_COMPILE=x86_64-linux-androidkernel-
-LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/bin
+LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gas/linux-x86
 
 MAKE_GOALS="
 bzImage