arch: Update 'cmds/record.c'

As part of the work to support the riscv64 architecture, a check
to see if a machine is supported was causing an 'Unsupported
machine ...' error when running in a risc-v environment.

This error occured as part of our work to support RISC-V, and we
have updated the code to include it in the list of supported
machines.

Signed-off-by: Gichoel Choi <gichoel3101@gmail.com>

cmds/record.c

@@ -1589,7 +1589,7 @@ static void check_binary(struct uftrace_opts *opts)
 	static char altname[PATH_MAX]; // for opts->exename to be persistent
 	uint16_t e_type;
 	uint16_t e_machine;
-	uint16_t supported_machines[] = { EM_X86_64, EM_ARM, EM_AARCH64, EM_386 };
+	uint16_t supported_machines[] = { EM_X86_64, EM_ARM, EM_AARCH64, EM_386, EM_RISCV };
 
 again:
 	/* if it cannot be found in PATH, then fails inside */