Expand check-{binutils,gas,ld}

- dash won't expand it as expect

Makefile.in

@@ -754,15 +754,15 @@ stamps/check-dhrystone-linux-%: \
 	PATH="$(srcdir)/scripts/wrapper/qemu:$(INSTALL_DIR)/bin:$(PATH)" RISC_V_SYSROOT="$(SYSROOT)" $(srcdir)/test/benchmarks/dhrystone/check -march=$($@_ARCH) -mabi=$($@_ABI) -cc=riscv$(XLEN)-unknown-elf-gcc -objdump=riscv$(XLEN)-unknown-elf-objdump -sim=riscv$($@_XLEN)-unknown-elf-run -out=$@ $(filter %.c,$^) || true
 
 stamps/check-binutils-newlib: stamps/build-gcc-newlib-stage2 stamps/build-qemu stamps/build-dejagnu
-	PATH="$(srcdir)/scripts/wrapper/qemu:$(INSTALL_DIR)/bin:$(PATH)" RISC_V_SYSROOT="$(SYSROOT)" $(MAKE) -C build-binutils-newlib check-{binutils,gas,ld} -k "RUNTESTFLAGS=--target_board='$(NEWLIB_TARGET_BOARDS)'" || true
+	PATH="$(srcdir)/scripts/wrapper/qemu:$(INSTALL_DIR)/bin:$(PATH)" RISC_V_SYSROOT="$(SYSROOT)" $(MAKE) -C build-binutils-newlib check-binutils check-gas check-ld -k "RUNTESTFLAGS=--target_board='$(NEWLIB_TARGET_BOARDS)'" || true
 	date > $@
 
 stamps/check-binutils-newlib-nano: stamps/build-gcc-newlib-stage2 stamps/build-qemu stamps/build-dejagnu
-	PATH="$(srcdir)/scripts/wrapper/qemu:$(INSTALL_DIR)/bin:$(PATH)" RISC_V_SYSROOT="$(SYSROOT)" $(MAKE) -C build-binutils-newlib check-{binutils,gas,ld} -k "RUNTESTFLAGS=--target_board='$(NEWLIB_NANO_TARGET_BOARDS)'" || true
+	PATH="$(srcdir)/scripts/wrapper/qemu:$(INSTALL_DIR)/bin:$(PATH)" RISC_V_SYSROOT="$(SYSROOT)" $(MAKE) -C build-binutils-newlib check-binutils check-gas check-ld -k "RUNTESTFLAGS=--target_board='$(NEWLIB_NANO_TARGET_BOARDS)'" || true
 	date > $@
 
 stamps/check-binutils-linux: stamps/build-gcc-linux-stage2 stamps/build-qemu stamps/build-dejagnu
-	PATH="$(srcdir)/scripts/wrapper/qemu:$(INSTALL_DIR)/bin:$(PATH)" RISC_V_SYSROOT="$(SYSROOT)" $(MAKE) -C build-binutils-linux check-{binutils,gas,ld} -k "RUNTESTFLAGS=--target_board='$(GLIBC_TARGET_BOARDS)'" || true
+	PATH="$(srcdir)/scripts/wrapper/qemu:$(INSTALL_DIR)/bin:$(PATH)" RISC_V_SYSROOT="$(SYSROOT)" $(MAKE) -C build-binutils-linux check-binutils check-gas check-ld -k "RUNTESTFLAGS=--target_board='$(GLIBC_TARGET_BOARDS)'" || true
 	date > $@
 
 stamps/check-gdb-newlib: stamps/build-gcc-newlib-stage2 stamps/build-gdb-newlib stamps/build-qemu stamps/build-dejagnu