selftests/bpf: Fix wrong binary in Makefile log output

Make log output incorrectly shows 'test_maps' as the binary name for every
'CLNG-BPF' build step, apparently picking up the last value defined for the
$(TRUNNER_BINARY) variable. Update the 'CLANG_BPF_BUILD_RULE' variants to
fix this confusing output.

Current output:
  CLNG-BPF [test_maps] access_map_in_map.bpf.o
  GEN-SKEL [test_progs] access_map_in_map.skel.h
  ...
  CLNG-BPF [test_maps] access_map_in_map.bpf.o
  GEN-SKEL [test_progs-no_alu32] access_map_in_map.skel.h
  ...
  CLNG-BPF [test_maps] access_map_in_map.bpf.o
  GEN-SKEL [test_progs-cpuv4] access_map_in_map.skel.h

After fix:
  CLNG-BPF [test_progs] access_map_in_map.bpf.o
  GEN-SKEL [test_progs] access_map_in_map.skel.h
  ...
  CLNG-BPF [test_progs-no_alu32] access_map_in_map.bpf.o
  GEN-SKEL [test_progs-no_alu32] access_map_in_map.skel.h
  ...
  CLNG-BPF [test_progs-cpuv4] access_map_in_map.bpf.o
  GEN-SKEL [test_progs-cpuv4] access_map_in_map.skel.h

Fixes: a5d0c26a ("selftests/bpf: Add a cpuv4 test runner for cpu=v4 testing")
Fixes: 89ad7420 ("selftests/bpf: Drop the need for LLVM's llc")
Signed-off-by: Tony Ambardar <tony.ambardar@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20240720052535.2185967-1-tony.ambardar@gmail.com

tools/testing/selftests/bpf/Makefile

@@ -428,23 +428,24 @@ $(OUTPUT)/cgroup_getset_retval_hooks.o: cgroup_getset_retval_hooks.h
 # $1 - input .c file
 # $2 - output .o file
 # $3 - CFLAGS
+# $4 - binary name
 define CLANG_BPF_BUILD_RULE
-	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
+	$(call msg,CLNG-BPF,$4,$2)
 	$(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v3 -o $2
 endef
 # Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
 define CLANG_NOALU32_BPF_BUILD_RULE
-	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
+	$(call msg,CLNG-BPF,$4,$2)
 	$(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v2 -o $2
 endef
 # Similar to CLANG_BPF_BUILD_RULE, but with cpu-v4
 define CLANG_CPUV4_BPF_BUILD_RULE
-	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
+	$(call msg,CLNG-BPF,$4,$2)
 	$(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v4 -o $2
 endef
 # Build BPF object using GCC
 define GCC_BPF_BUILD_RULE
-	$(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
+	$(call msg,GCC-BPF,$4,$2)
 	$(Q)$(BPF_GCC) $3 -DBPF_NO_PRESERVE_ACCESS_INDEX -Wno-attributes -O2 -c $1 -o $2
 endef
 
@@ -537,7 +538,7 @@ $(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.bpf.o:				\
 	$$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@,			\
 					  $(TRUNNER_BPF_CFLAGS)         \
 					  $$($$<-CFLAGS)		\
-					  $$($$<-$2-CFLAGS))
+					  $$($$<-$2-CFLAGS),$(TRUNNER_BINARY))
 
 $(TRUNNER_BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 	$$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)