Rename process_simple_wait to process_wait

Adding "simple" in the function name brings no benefit.

app/src/sys/unix/process.c

@@ -135,7 +135,7 @@ process_terminate(pid_t pid) {
 }
 
 bool
-process_simple_wait(pid_t pid, int *exit_code) {
+process_wait(pid_t pid, int *exit_code) {
     int status;
     int code;
     if (waitpid(pid, &status, 0) == -1 || !WIFEXITED(status)) {

app/src/sys/win/process.c

@@ -60,7 +60,7 @@ process_terminate(HANDLE handle) {
 }
 
 bool
-process_simple_wait(HANDLE handle, DWORD *exit_code) {
+process_wait(HANDLE handle, DWORD *exit_code) {
     DWORD code;
     if (WaitForSingleObject(handle, INFINITE) != WAIT_OBJECT_0
             || !GetExitCodeProcess(handle, &code)) {