Only generate breakpad symbols for ELF binaries

When BREAKPAD_GENERATE_SYMBOLS is set to true, the build will attempt
to run dump_syms for all dynamic binaries.  However some build targets
are now using cc_prebuilt_binary for installing python host scripts.
This causes dump_syms to return an error, causing the build to fail.
So check instead if the file is an ELF binary before running dump_syms.

Bug: 65065674
Test: Built AT target successfully.
Merged-In: Ibe7d3ebd312376600cf21efa111489451a4e7578
Change-Id: Ibe7d3ebd312376600cf21efa111489451a4e7578
(cherry picked from commit ee848655db462afe21f8327d83a5f69e3f3d6128)
diff --git a/core/dynamic_binary.mk b/core/dynamic_binary.mk
index 949793b..f44b8a8 100644
--- a/core/dynamic_binary.mk
+++ b/core/dynamic_binary.mk
@@ -99,10 +99,15 @@
 my_breakpad_path := $(TARGET_OUT_BREAKPAD)/$(patsubst $(PRODUCT_OUT)/%,%,$(my_module_path))
 breakpad_input := $(relocation_packer_output)
 breakpad_output := $(my_breakpad_path)/$(my_installed_module_stem).sym
-$(breakpad_output) : $(breakpad_input) | $(BREAKPAD_DUMP_SYMS)
+$(breakpad_output) : $(breakpad_input) | $(BREAKPAD_DUMP_SYMS) $(PRIVATE_READELF)
 	@echo "target breakpad: $(PRIVATE_MODULE) ($@)"
 	@mkdir -p $(dir $@)
-	$(hide) $(BREAKPAD_DUMP_SYMS) -c $< > $@
+	$(hide) if $(PRIVATE_READELF) -S $< > /dev/null 2>&1 ; then \
+	  $(BREAKPAD_DUMP_SYMS) -c $< > $@ ; \
+	else \
+	  echo "skipped for non-elf file."; \
+	  touch $@; \
+	fi
 $(LOCAL_BUILT_MODULE) : $(breakpad_output)
 endif