Export of internal Abseil changes.

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008301e65c323ea0b78e4a92221bf43f7f01e358 by Abseil Team <absl-team@google.com>:

Add k...Pad17 through 20 PadSpec enum values.

PiperOrigin-RevId: 223371590

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ad0580b0a215257044e090181630793b7e5e9ab0 by Jon Cohen <cohenjon@google.com>:

Make the table in the prefetch check not fit in L2 cache.  This should help deflake the test.

PiperOrigin-RevId: 223224646

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77c76690626b89944946d01da5e3428b763103e8 by Abseil Team <absl-team@google.com>:

Fixed typo in container by replacing asbl::Hash with absl::Hash.

PiperOrigin-RevId: 223083789
GitOrigin-RevId: 008301e65c323ea0b78e4a92221bf43f7f01e358
Change-Id: I81399f09cd82fbb27bcfec4c1517bb5d2fd07f3b

absl/strings/str_cat.h

@@ -97,6 +97,10 @@ enum PadSpec : uint8_t {
   kZeroPad14,
   kZeroPad15,
   kZeroPad16,
+  kZeroPad17,
+  kZeroPad18,
+  kZeroPad19,
+  kZeroPad20,
 
   kSpacePad2 = kZeroPad2 + 64,
   kSpacePad3,
@@ -113,6 +117,10 @@ enum PadSpec : uint8_t {
   kSpacePad14,
   kSpacePad15,
   kSpacePad16,
+  kSpacePad17,
+  kSpacePad18,
+  kSpacePad19,
+  kSpacePad20,
 };
 
 // -----------------------------------------------------------------------------