tests: omit possibly set CC/LD/... flags

The chances of failure when the flags are set is reasonably small
(famous last words), so omit them. This allows us to handle any
variation without adding heaps of extra code.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

run_test.sh

@@ -62,7 +62,7 @@ TEST_TMPFILES=(
 # Reportedly in some cases the entries in the modinfo output are ordered
 # differently. Fetch whatever we need and sort them.
 modinfo_quad() {
-    modinfo $1 | egrep "^description:|^filename:|^license:|^version:" | sort
+    modinfo $1 | grep -E "^description:|^filename:|^license:|^version:" | sort
 }
 
 SIGNING_MESSAGE=""
@@ -195,6 +195,9 @@ generalize_expected_output() {
     # Apport related error that can occur in the CI. Drop from the output to be more generic
     sed -i "/^python3: can't open file '\/usr\/share\/apport\/package-hooks\/dkms_packages.py'\: \[Errno 2\] No such file or directory$/d" ${output_log}
     sed -i "/^ERROR (dkms apport): /d" ${output_log}
+
+    # Swap any CC/LD/... flags (if set) with a placeholder message
+    sed -i "s|\(make -j1 KERNELRELEASE=${KERNEL_VER} all\).*|\1 <omitting possibly set CC/LD/... flags>|" ${output_log}
 }
 
 run_with_expected_output() {
@@ -1425,7 +1428,7 @@ Building module:
 Cleaning build area...
 Building module(s)...(bad exit status: 2)
 Failed command:
-make -j1 KERNELRELEASE=${KERNEL_VER} all
+make -j1 KERNELRELEASE=${KERNEL_VER} all <omitting possibly set CC/LD/... flags>
 Error! Bad return status for module build on kernel: ${KERNEL_VER} (${KERNEL_ARCH})
 Consult /var/lib/dkms/dkms_failing_test/1.0/build/make.log for more information.
 dkms autoinstall on ${KERNEL_VER}/${KERNEL_ARCH} failed for dkms_failing_test(10)
@@ -1444,7 +1447,7 @@ Building module:
 Cleaning build area...
 Building module(s)...(bad exit status: 2)
 Failed command:
-make -j1 KERNELRELEASE=${KERNEL_VER} all
+make -j1 KERNELRELEASE=${KERNEL_VER} all <omitting possibly set CC/LD/... flags>
 Error! Bad return status for module build on kernel: ${KERNEL_VER} (${KERNEL_ARCH})
 Consult /var/lib/dkms/dkms_failing_test/1.0/build/make.log for more information.
 dkms autoinstall on ${KERNEL_VER}/${KERNEL_ARCH} failed for dkms_failing_test(10)
@@ -1593,7 +1596,7 @@ Building module:
 Cleaning build area...
 Building module(s)...(bad exit status: 2)
 Failed command:
-make -j1 KERNELRELEASE=${KERNEL_VER} all
+make -j1 KERNELRELEASE=${KERNEL_VER} all <omitting possibly set CC/LD/... flags>
 Error! Bad return status for module build on kernel: ${KERNEL_VER} (${KERNEL_ARCH})
 Consult /var/lib/dkms/dkms_failing_test/1.0/build/make.log for more information.