Add build/soong/bin to the paths

This gives us a good place to put scripts on the PATH instead of adding
more functions to envsetup.sh

Test: GENERATE_SOONG_DEBUG=true m nothing ; soongdbg ...
Change-Id: I3c1a80fc8aae8de548bfe9036dc86fa006fc58c6
diff --git a/envsetup.sh b/envsetup.sh
index e180cf1..6111952 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -366,7 +366,8 @@
     fi
 
     # And in with the new...
-    ANDROID_GLOBAL_BUILD_PATHS=$T/build/bazel/bin
+    ANDROID_GLOBAL_BUILD_PATHS=$T/build/soong/bin
+    ANDROID_GLOBAL_BUILD_PATHS+=:$T/bazel/bin
     ANDROID_GLOBAL_BUILD_PATHS+=:$T/development/scripts
     ANDROID_GLOBAL_BUILD_PATHS+=:$T/prebuilts/devtools/tools