Simplify libcrash_dumper interface and make window_manager gen crash dumps

src/platform/crash/Makefile

Index: src/platform/crash/Makefile
diff --git a/src/platform/crash/Makefile b/src/platform/crash/Makefile
index 06679f91297a53e81cb81e6ee59c4566582697c1..0d818b4254a15563120a6247c7c4cd4501efac03 100644
--- a/src/platform/crash/Makefile
+++ b/src/platform/crash/Makefile
@@ -3,7 +3,7 @@
 # found in the LICENSE file.
 
 CRASH_BIN = crash_reporter
-CRASH_LIB = libcrash_dumper.so
+CRASH_LIB = libcrash.so
 CRASH_OBJS = system_logging.o user_collector.o
 TEST_OBJS = $(CRASH_OBJS) system_logging_mock.o
 TEST_BINS = user_collector_test
@@ -17,14 +17,15 @@ LIB_DIRS =
 # We need -fPIC for linking objects into shared objects.
 CXXFLAGS += -fPIC -Wall -Werror
 
-all: $(CRASH_BIN) $(CRASH_LIB)
-
-$(CRASH_BIN): crash_reporter.o $(CRASH_OBJS)
-	$(CXX) $(CXXFLAGS) $(LIB_DIRS) $^ $(LIBS) -o $@
+all:
+	echo "Specify either $(CRASH_BIN) or $(CRASH_LIB)"
 
 $(CRASH_LIB): crash_dumper.o
 	$(CXX) -shared -lbreakpad_client $^ -o $@
 
+$(CRASH_BIN): crash_reporter.o $(CRASH_OBJS)
+	$(CXX) $(CXXFLAGS) $(LIB_DIRS) $^ -lcrash_dumper $(LIBS) -o $@
+
 tests: $(TEST_BINS)
 
 user_collector_test: user_collector_test.o $(TEST_OBJS)