Build debug symbols for assembly.

We build with them for C files, so include it for the assembly files
too.

Change-Id: I1c595e18314b245330a6f047d0a97a031d55b115
Reviewed-on: https://boringssl-review.googlesource.com/9150
Reviewed-by: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a8befab..662a2c9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,6 +37,7 @@
   endif()
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${C_CXX_FLAGS} -Wmissing-prototypes -Wold-style-definition -Wstrict-prototypes")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 ${C_CXX_FLAGS} -Wmissing-declarations")
+  set(CMAKE_ASM_FLAGS "-Wa,-g")
 elseif(MSVC)
   set(MSVC_DISABLED_WARNINGS_LIST
       "C4100" # 'exarg' : unreferenced formal parameter
@@ -89,6 +90,7 @@
                             ${MSVC_LEVEL4_WARNINGS_LIST})
   set(CMAKE_C_FLAGS   "-Wall -WX ${MSVC_DISABLED_WARNINGS_STR} ${MSVC_LEVEL4_WARNINGS_STR}")
   set(CMAKE_CXX_FLAGS "-Wall -WX ${MSVC_DISABLED_WARNINGS_STR} ${MSVC_LEVEL4_WARNINGS_STR}")
+  set(CMAKE_ASM_NASM_FLAGS "-g cv8")
   add_definitions(-D_HAS_EXCEPTIONS=0)
   add_definitions(-DWIN32_LEAN_AND_MEAN)
   add_definitions(-DNOMINMAX)

util/generate-coverage.sh

diff --git a/util/generate-coverage.sh b/util/generate-coverage.sh
index 2fbe6b8..edd2edb 100755
--- a/util/generate-coverage.sh
+++ b/util/generate-coverage.sh
@@ -28,7 +28,7 @@
 
 cd "$BUILD"
 cmake "$SRC" -GNinja -DCMAKE_C_FLAGS='-fprofile-arcs -ftest-coverage' \
-  -DCMAKE_CXX_FLAGS='-fprofile-arcs -ftest-coverage' -DCMAKE_ASM_FLAGS='-Wa,-g'
+  -DCMAKE_CXX_FLAGS='-fprofile-arcs -ftest-coverage'
 ninja
 
 cp -r "$SRC/crypto" "$SRC/decrepit" "$SRC/include" "$SRC/ssl" "$SRC/tool" \