vendorsetup: Override hostname to avoid leaking info

Matches the Android 12 build sandbox: https://android.googlesource.com/platform/build/+/refs/tags/android-12.0.0_r2/Changes.md

Change-Id: I8a9790937641ff35d49cdfc974abae1392175a4d
Signed-off-by: Omkar Chandorkar <gotenksIN@aospa.co>

build.sh

@@ -84,6 +84,7 @@ if [ $# -eq 0 ]; then
     showHelpAndExit
 fi
 export DEVICE="$1"; shift
+export FILE_NAME_TAG=eng.nobody
 
 # Make sure we are running on 64-bit before carrying on with anything
 ARCH=$(uname -m | sed 's/x86_//;s/i[3-6]86/32/')
@@ -196,13 +197,6 @@ fi
 echo -e "${CLR_BLD_BLU}Starting compilation${CLR_RST}"
 echo -e ""
 
-# If we aren't in Jenkins, use the engineering tag
-if [ -z "${BUILD_NUMBER}" ]; then
-    export FILE_NAME_TAG=eng.$USER
-else
-    export FILE_NAME_TAG=$BUILD_NUMBER
-fi
-
 # Build a specific module(s)
 if [ "${MODULES}" ]; then
     m ${MODULES[@]} "$CMD"

vendorsetup.sh

@@ -0,0 +1,5 @@
+# Shebang is intentionally missing - do not run as a script
+
+# Override host metadata to make builds more reproducible and avoid leaking info
+export BUILD_USERNAME=nobody
+export BUILD_HOSTNAME=android-build