move all weak memory tests into their folder

Author: RalfJung

src/tools/miri/tests/pass/0weak_memory_consistency.rs renamed to src/tools/miri/tests/pass/0weak_memory/consistency.rs

@@ -51,7 +51,7 @@ fn spin_until_bool(loc: &AtomicBool, ord: Ordering, val: bool) -> bool {
 }
 
 /// Test matching https://www.doc.ic.ac.uk/~afd/homepages/papers/pdfs/2017/POPL.pdf, Figure 7.
-/// (The Figure 8 test is in `weak_memory/weak.rs`.)
+/// (The Figure 8 test is in `weak.rs`.)
 fn test_corr() {
     let x = static_atomic(0);
     let y = static_atomic(0);

src/tools/miri/tests/pass/0weak_memory_consistency_sc.rs renamed to src/tools/miri/tests/pass/0weak_memory/consistency_sc.rs

@@ -349,7 +349,7 @@ fn test_sc_relaxed() {
 }
 
 pub fn main() {
-    for _ in 0..50 {
+    for _ in 0..32 {
         test_sc_store_buffering();
         test_iriw_sc_rlx();
         test_cpp20_sc_fence_fix();