ecore_file - address issue about false positive of finding a file in ./

it may report an exe is installed if it happens to be in cwd but cwd
isnt in path. the "full/relative" path handling case mishandled this.
fixes T8678

@fix

src/lib/ecore_file/ecore_file_path.c

@@ -95,7 +95,10 @@ ecore_file_app_installed(const char *exe)
    char  buf[PATH_MAX];
 
    if (!exe) return EINA_FALSE;
-   if (ecore_file_can_exec(exe)) return EINA_TRUE;
+   if (((!strncmp(exe, "/", 1)) ||
+        (!strncmp(exe, "./", 2)) ||
+        (!strncmp(exe, "../", 3))) &&
+       ecore_file_can_exec(exe)) return EINA_TRUE;
 
    EINA_LIST_FOREACH(__ecore_file_path_bin, l, dir)
      {

src/lib/eina/eina_vpath.c

@@ -50,12 +50,10 @@ static char *
 _fallback_runtime_dir(const char *home)
 {
    char buf[PATH_MAX];
-#if defined(HAVE_GETUID)
-   uid_t uid = getuid();
-#endif
    struct stat st;
-
 #if defined(HAVE_GETUID) && defined(HAVE_GETEUID)
+   uid_t uid = getuid();
+
    if (setuid(geteuid()) != 0)
       {
          fprintf(stderr,