internal/rosa: respect preferred loadavg target

This generally improves build performance and system responsiveness.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/package/firmware.az

@@ -34,7 +34,7 @@ package firmware {
 		// requires pre-commit
 		skipCheck = true;
 
-		install = "make " + jobsFlagE + " DESTDIR=/work/system dedup";
+		install = "make " + jobsFlagE + " " + loadFlagE + " DESTDIR=/work/system dedup";
 	};
 
 	inputs = [

internal/rosa/package/git.az

@@ -70,6 +70,7 @@ disable_test t5515-fetch-merge-logic
 
 		install = `make \
 	` + jobsFlagE + ` \
+	` + loadFlagE + ` \
 	DESTDIR=/work \
 	NO_INSTALL_HARDLINKS=1 \
 	install`;

internal/rosa/package/kernel/package.az

@@ -111,6 +111,7 @@ install -Dm0500 \
 
 make \
 	` + jobsFlagE + ` \
+	` + loadFlagE + ` \
 	-f /usr/src/kernel/Makefile \
 	O=/tmp/kbuild \
 	LLVM=1 \

internal/rosa/package/ninja.az

@@ -23,7 +23,7 @@ python3 /usr/src/ninja/configure.py \
 	--bootstrap
 python3 /usr/src/ninja/configure.py \
 	--gtest-source-dir=/usr/src/extra/googletest
-./ninja ` + jobsFlagE + ` all
+./ninja ` + jobsFlagE + ` ` + loadFlagE + ` all
 `;
 
 		check = "./ninja_test";