sd-boot: Let compiler figure out libgcc location

Since we now let the compiler call the linker for us, we can just
rely on it to find the right (static) libgcc to use.

src/boot/efi/meson.build

@@ -314,7 +314,6 @@ foreach file : fundamental_source_paths + common_sources + systemd_boot_sources
         endif
 endforeach
 
-libgcc_file_name = run_command(efi_cc + ['-print-libgcc-file-name']).stdout().strip()
 systemd_boot_efi_name = 'systemd-boot@0@.efi'.format(efi_arch[0])
 stub_elf_name = 'linux@0@.elf.stub'.format(efi_arch[0])
 stub_efi_name = 'linux@0@.efi.stub'.format(efi_arch[0])
@@ -326,7 +325,7 @@ foreach tuple : [['systemd_boot.so', systemd_boot_efi_name, systemd_boot_objects
                 tuple[0],
                 input : tuple[2],
                 output : tuple[0],
-                command : [efi_cc, '-o', '@OUTPUT@', efi_ldflags, tuple[2], '-lefi', '-lgnuefi', libgcc_file_name],
+                command : [efi_cc, '-o', '@OUTPUT@', efi_ldflags, tuple[2], '-lefi', '-lgnuefi', '-lgcc'],
                 install : tuple[3],
                 install_dir : bootlibdir)