Update gcc-arm toolchains to 9.2-2019.12

Besides the update, rename toolchain including the infix '-none-'. Also, avoid
hardcoded filenames and/or directories referring toolchains.

Change-Id: I576aa5bc9ca0b29b5b8ec6264af540b0053bc4e5
Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
diff --git a/coverity/run_coverity.sh b/coverity/run_coverity.sh
index 374b1fe..b2e741a 100755
--- a/coverity/run_coverity.sh
+++ b/coverity/run_coverity.sh
@@ -48,10 +48,10 @@
     fi
 
     # Check that the AArch64 cross-toolchain is available.
-    aarch64-linux-gnu-gcc --version
+    aarch64-none-elf-gcc --version
 
     # Check that the AArch32 cross-toolchain is available.
-    arm-linux-gnueabihf-gcc --version
+    arm-none-eabi-gcc --version
 
     echo
     echo "Checks complete."
@@ -75,13 +75,13 @@
     cov-configure				\
 	--comptype gcc				\
 	--template				\
-	--compiler aarch64-linux-gnu-gcc	\
+	--compiler aarch64-none-elf-gcc	\
 	--config cov-config/config.xml
     #   2) AArch32 compiler
     cov-configure				\
 	--comptype gcc				\
 	--template				\
-	--compiler arm-linux-gnueabihf-gcc	\
+	--compiler arm-none-eabi-gcc	\
 	--config cov-config/config.xml
 }