e.g.

[15582/19513] SOLINK ./libstandalonelibwebviewchromium.so
FAILED: libstandalonelibwebviewchromium.so libstandalonelibwebviewchromium.so.TOC lib.unstripped/libstandalonelibwebviewchromium.so 
python "/b/c/b/Android_MIPS_Builder__dbg_/src/build/toolchain/gcc_solink_wrapper.py" --readelf="../../third_party/android_tools/ndk/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64/bin/mipsel-linux-android-readelf" --nm="../../third_party/android_tools/ndk/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64/bin/mipsel-linux-android-nm" --strip=../../third_party/android_tools/ndk/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64/bin/mipsel-linux-android-strip --sofile="./lib.unstripped/libstandalonelibwebviewchromium.so" --tocfile="./libstandalonelibwebviewchromium.so.TOC" --output="./libstandalonelibwebviewchromium.so"  -- ../../third_party/android_tools/ndk/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64/bin/mipsel-linux-android-g++ -shared -Wl,-shared,-Bsymbolic -Wl,--fatal-warnings -fPIC -Wl,-z,noexecstack -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -Wl,--as-needed -Wl,--build-id=sha1 -Wl,--no-undefined -Wl,--exclude-libs=libgcc.a -Wl,--exclude-libs=libc++_static.a -Wl,--exclude-libs=libvpx_assembly_arm.a -Werror -nostdlib --sysroot=../../third_party/android_tools/ndk/platforms/android-16/arch-mips  -Wl,-wrap,calloc -Wl,-wrap,free -Wl,-wrap,malloc -Wl,-wrap,memalign -Wl,-wrap,posix_memalign -Wl,-wrap,pvalloc -Wl,-wrap,realloc -Wl,-wrap,valloc -L../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++/libs/mips -o "./lib.unstripped/libstandalonelibwebviewchromium.so" -Wl,-soname="libstandalonelibwebviewchromium.so" @"./libstandalonelibwebviewchromium.so.rsp"
collect2: error: ld terminated with signal 9 [Killed]

from https://build.chromium.org/p/chromium.android/builders/Android%20MIPS%20Builder%20(dbg)