Change multidex version file

- Stop collecting build id and version to allow better behavior with
  incremental builds.
- Make it resistant to git errors.

Test: mm
Change-Id: I03b1e36048f92f50227cfc0e370454438bee31cf
diff --git a/instrumentation/Android.mk b/instrumentation/Android.mk
index 59805be..ec50b8c 100644
--- a/instrumentation/Android.mk
+++ b/instrumentation/Android.mk
@@ -21,20 +21,12 @@
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 
 
-ifneq "" "$(filter eng.%,$(BUILD_NUMBER))"
-  ASMDI_VERSION_NAME_TAG := eng.$(USER)
-else
-  ASMDI_VERSION_NAME_TAG := $(BUILD_NUMBER)
-endif
-
-ASMDI_GIT_VERSION_TAG := `cd $(LOCAL_PATH); git log --format="%H" -n 1`
+ASMDI_GIT_VERSION_TAG := `cd $(LOCAL_PATH); git log --format="%H" -n 1 || (echo git hash not available; exit 0)`
 
 ASMDI_VERSION_INTERMEDIATE = $(call intermediates-dir-for,JAVA_LIBRARIES,$(LOCAL_MODULE),,COMMON)/$(LOCAL_MODULE).version.txt
 $(ASMDI_VERSION_INTERMEDIATE):
 	$(hide) mkdir -p $(dir $@)
-	$(hide) echo "build.version=$(ASMDI_VERSION_NAME_TAG)" > $@
-	$(hide) echo "build.id=$(BUILD_ID)" >> $@
-	$(hide) echo "git.version=$(ASMDI_GIT_VERSION_TAG)" >> $@
+	$(hide) echo "git.version=$(ASMDI_GIT_VERSION_TAG)" > $@
 
 LOCAL_JAVA_RESOURCE_FILES := $(ASMDI_VERSION_INTERMEDIATE)
 
diff --git a/library/Android.mk b/library/Android.mk
index 3ce9c46..b38620e 100644
--- a/library/Android.mk
+++ b/library/Android.mk
@@ -19,20 +19,12 @@
 LOCAL_SDK_VERSION := 4
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 
-ifneq "" "$(filter eng.%,$(BUILD_NUMBER))"
-  ASMD_VERSION_NAME_TAG := eng.$(USER)
-else
-  ASMD_VERSION_NAME_TAG := $(BUILD_NUMBER)
-endif
-
-ASMD_GIT_VERSION_TAG := `cd $(LOCAL_PATH); git log --format="%H" -n 1`
+ASMD_GIT_VERSION_TAG := `cd $(LOCAL_PATH); git log --format="%H" -n 1 || (echo git hash not available; exit 0)`
 
 ASMD_VERSION_INTERMEDIATE = $(call intermediates-dir-for,JAVA_LIBRARIES,$(LOCAL_MODULE),,COMMON)/$(LOCAL_MODULE).version.txt
 $(ASMD_VERSION_INTERMEDIATE):
 	$(hide) mkdir -p $(dir $@)
-	$(hide) echo "build.version=$(ASMD_VERSION_NAME_TAG)" > $@
-	$(hide) echo "build.id=$(BUILD_ID)" >> $@
-	$(hide) echo "git.version=$(ASMD_GIT_VERSION_TAG)" >> $@
+	$(hide) echo "git.version=$(ASMD_GIT_VERSION_TAG)" > $@
 
 LOCAL_JAVA_RESOURCE_FILES := $(ASMD_VERSION_INTERMEDIATE)