Include debugging info in all compilation modes

Change-Id: Ibaba373b968f85c625d2ee6970d354ff090da5c0
diff --git a/aos/downloader/downloader.bzl b/aos/downloader/downloader.bzl
index dff198a..51d6916 100644
--- a/aos/downloader/downloader.bzl
+++ b/aos/downloader/downloader.bzl
@@ -30,8 +30,11 @@
 
 Running this with `bazel run` will actually download everything.
 
+This also generates a start_list.txt file with the names of binaries to start.
+
 Attrs:
   srcs: The files to download. They currently all get shoved into one folder.
+  start_srcs: Like srcs, except they also get put into start_list.txt.
   default_target: The default host to download to. If not specified, defaults to
                   roboRIO-971.local.
 '''
diff --git a/tools/cpp/CROSSTOOL b/tools/cpp/CROSSTOOL
index d159e5d..d76637c 100644
--- a/tools/cpp/CROSSTOOL
+++ b/tools/cpp/CROSSTOOL
@@ -255,11 +255,9 @@
   linker_flag: "-Wl,--warn-execstack"
   linker_flag: "-Wl,--detect-odr-violations"
 
-  compilation_mode_flags {
-    mode: DBG
-    # Enable debug symbols.
-    compiler_flag: "-ggdb3"
-  }
+  # Enable debug symbols.
+  compiler_flag: "-ggdb3"
+
   compilation_mode_flags {
     mode: OPT
 
@@ -508,11 +506,9 @@
   #linker_flag: "-Wl,--warn-execstack"
   #linker_flag: "-Wl,--detect-odr-violations"
 
-  compilation_mode_flags {
-    mode: DBG
-    # Enable debug symbols.
-    compiler_flag: "-ggdb3"
-  }
+  # Enable debug symbols.
+  compiler_flag: "-ggdb3"
+
   compilation_mode_flags {
     mode: OPT