Fix/remove flawed alignment-related overflow tests.

Fix/remove three related flawed tests that attempted to cause OOM due to
large request size and alignment constraint.  Although these tests
"passed" on 64-bit systems due to the virtual memory hole, they could
pass on some 32-bit systems.

test/integration/aligned_alloc.c

@@ -47,10 +47,10 @@ TEST_BEGIN(test_oom_errors)
 
 #if LG_SIZEOF_PTR == 3
 	alignment = UINT64_C(0x4000000000000000);
-	size      = UINT64_C(0x8400000000000001);
+	size      = UINT64_C(0xc000000000000001);
 #else
 	alignment = 0x40000000LU;
-	size      = 0x84000001LU;
+	size      = 0xc0000001LU;
 #endif
 	set_errno(0);
 	p = aligned_alloc(alignment, size);

test/integration/mallocx.c

@@ -34,26 +34,6 @@ TEST_BEGIN(test_basic)
 }
 TEST_END
 
-TEST_BEGIN(test_alignment_errors)
-{
-	void *p;
-	size_t nsz, sz, alignment;
-
-#if LG_SIZEOF_PTR == 3
-	alignment = UINT64_C(0x4000000000000000);
-	sz        = UINT64_C(0x8400000000000001);
-#else
-	alignment = 0x40000000LU;
-	sz        = 0x84000001LU;
-#endif
-	nsz = nallocx(sz, MALLOCX_ALIGN(alignment));
-	assert_zu_ne(nsz, 0, "Unexpected nallocx() error");
-	p = mallocx(sz, MALLOCX_ALIGN(alignment));
-	assert_ptr_null(p, "Expected error for mallocx(%zu, %#x)", sz,
-	    MALLOCX_ALIGN(alignment));
-}
-TEST_END
-
 TEST_BEGIN(test_alignment_and_size)
 {
 	size_t nsz, rsz, sz, alignment, total;
@@ -114,6 +94,5 @@ main(void)
 
 	return (test(
 	    test_basic,
-	    test_alignment_errors,
 	    test_alignment_and_size));
 }

test/integration/posix_memalign.c

@@ -43,10 +43,10 @@ TEST_BEGIN(test_oom_errors)
 
 #if LG_SIZEOF_PTR == 3
 	alignment = UINT64_C(0x4000000000000000);
-	size      = UINT64_C(0x8400000000000001);
+	size      = UINT64_C(0xc000000000000001);
 #else
 	alignment = 0x40000000LU;
-	size      = 0x84000001LU;
+	size      = 0xc0000001LU;
 #endif
 	assert_d_ne(posix_memalign(&p, alignment, size), 0,
 	    "Expected error for posix_memalign(&p, %zu, %zu)",