usign-exec: simplify usign execv calls

When the executable to exec is passed as an absolute path, execv() and
execvp() are equivalent, so there it no need to make the code hard to
read with #ifdefs.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

usign-exec.c

@@ -72,13 +72,7 @@ int usign_s(const char *msgfile, const char *seckeyfile, const char *sigfile, bo
 		return -1;
 
 	case 0:
-		if (
-#ifdef UCERT_HOST_BUILD
-			execvp(usign_argv[0], (char *const *)usign_argv)
-#else
-			execv(usign_argv[0], (char *const *)usign_argv)
-#endif
-		   )
+		if (execvp(usign_argv[0], (char *const *)usign_argv))
 			return -1;
 
 		break;
@@ -141,13 +135,7 @@ static int usign_f(char *fingerprint, const char *pubkeyfile, const char *seckey
 		close(fds[0]);
 		close(fds[1]);
 
-		if (
-#ifdef UCERT_HOST_BUILD
-		    execvp(usign_argv[0], (char *const *)usign_argv)
-#else
-		    execv(usign_argv[0], (char *const *)usign_argv)
-#endif
-		   )
+		if (execvp(usign_argv[0], (char *const *)usign_argv))
 			return -1;
 
 		break;
@@ -247,13 +235,7 @@ int usign_v(const char *msgfile, const char *pubkeyfile,
 		return -1;
 
 	case 0:
-		if (
-#ifdef UCERT_HOST_BUILD
-		    execvp(usign_argv[0], (char *const *)usign_argv)
-#else
-		    execv(usign_argv[0], (char *const *)usign_argv)
-#endif
-		   )
+		if (execvp(usign_argv[0], (char *const *)usign_argv))
 			return -1;
 
 		break;