misc/cgo/testcarchive,testcshared: deflake tests

After a failure on the build dashboard I tested testcarchive test 2 and
found that it failed an average of 1 in 475 runs on my laptop.  With
this change it ran over 50,000 times without failing.  I bumped up the
other iteration limits to correspond.

Change-Id: I0155c68161a2c2a09ae25c91e9269f1e8702628d
Reviewed-on: https://go-review.googlesource.com/18309
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

misc/cgo/testcarchive/main2.c

@@ -152,7 +152,7 @@ int main(int argc, char** argv) {
 			perror("sched_yield");
 		}
 		i++;
-		if (i > 10000) {
+		if (i > 100000) {
 			fprintf(stderr, "looping too long waiting for signal\n");
 			exit(EXIT_FAILURE);
 		}

misc/cgo/testcarchive/main3.c

@@ -68,7 +68,7 @@ int main(int argc, char** argv) {
 			perror("sched_yield");
 		}
 		i++;
-		if (i > 10000) {
+		if (i > 100000) {
 			fprintf(stderr, "looping too long waiting for signal\n");
 			exit(EXIT_FAILURE);
 		}
@@ -142,7 +142,7 @@ int main(int argc, char** argv) {
 			perror("sched_yield");
 		}
 		i++;
-		if (i > 10000) {
+		if (i > 100000) {
 			fprintf(stderr, "looping too long waiting for signal\n");
 			exit(EXIT_FAILURE);
 		}

misc/cgo/testcarchive/main4.c

@@ -78,7 +78,7 @@ static void* thread1(void* arg) {
 			perror("sched_yield");
 		}
 		i++;
-		if (i > 10000) {
+		if (i > 100000) {
 			fprintf(stderr, "looping too long waiting for signal\n");
 			exit(EXIT_FAILURE);
 		}
@@ -133,7 +133,7 @@ static void* thread2(void* arg) {
 			perror("sched_yield");
 		}
 		i++;
-		if (i > 10000) {
+		if (i > 100000) {
 			fprintf(stderr, "looping too long waiting for signal\n");
 			exit(EXIT_FAILURE);
 		}

misc/cgo/testcshared/main4.c

@@ -170,7 +170,7 @@ int main(int argc, char** argv) {
 			perror("sched_yield");
 		}
 		i++;
-		if (i > 10000) {
+		if (i > 100000) {
 			fprintf(stderr, "looping too long waiting for signal\n");
 			exit(EXIT_FAILURE);
 		}

misc/cgo/testcshared/main5.c

@@ -81,7 +81,7 @@ int main(int argc, char** argv) {
 			perror("sched_yield");
 		}
 		i++;
-		if (i > 10000) {
+		if (i > 100000) {
 			fprintf(stderr, "looping too long waiting for signal\n");
 			exit(EXIT_FAILURE);
 		}
@@ -186,7 +186,7 @@ int main(int argc, char** argv) {
 			perror("sched_yield");
 		}
 		i++;
-		if (i > 10000) {
+		if (i > 100000) {
 			fprintf(stderr, "looping too long waiting for signal\n");
 			exit(EXIT_FAILURE);
 		}