uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/build-support/setup-hooks/make-coverage-analysis-report.sh

@@ -0,0 +1,25 @@
+postPhases+=" coverageReportPhase"
+
+coverageReportPhase() {
+    lcov --directory . --capture --output-file app.info
+    set -o noglob
+    lcov --remove app.info ${lcovFilter:-"/nix/store/*"} > app2.info
+    set +o noglob
+    mv app2.info app.info
+
+    mkdir -p $out/coverage
+    genhtml app.info $lcovExtraTraceFiles -o $out/coverage > log
+
+    # Grab the overall coverage percentage so that Hydra can plot it over time.
+    mkdir -p $out/nix-support
+    lineCoverage="$(sed 's/.*lines\.*: \([0-9\.]\+\)%.*/\1/; t ; d' log)"
+    functionCoverage="$(sed 's/.*functions\.*: \([0-9\.]\+\)%.*/\1/; t ; d' log)"
+    if [ -z "$lineCoverage" -o -z "$functionCoverage" ]; then
+        echo "failed to get coverage statistics"
+        exit 1
+    fi
+    echo "lineCoverage $lineCoverage %" >> $out/nix-support/hydra-metrics
+    echo "functionCoverage $functionCoverage %" >> $out/nix-support/hydra-metrics
+
+    echo "report coverage $out/coverage" >> $out/nix-support/hydra-build-products
+}