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Blacklist xlc 32-bit inlining.

Per a suggestion from Tom Lane. Back-patch to 9.0 (all supportedversions). While only 9.4 and up have code known to elicit thiscompiler bug, we were disabling inlining by accident until commit43d89a2.

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Original file line number	Diff line number	Diff line change
`@@ -7,3 +7,12 @@ fun()`
`7`	`7`	`{`
`8`	`8`	`return0;`
`9`	`9`	`}`
	`10`	`+`
	`11`	`+/*`
	`12`	`+ * "IBM XL C/C++ for AIX, V12.1" miscompiles, for 32-bit, some inline`
	`13`	`+ * expansions of ginCompareItemPointers() "long long" arithmetic. To take`
	`14`	`+ * advantage of inlining, build a 64-bit PostgreSQL.`
	`15`	`+ */`
	`16`	`+#if defined(__ILP32__)&& defined(__IBMC__)`
	`17`	`+#error "known inlining bug"`
	`18`	`+#endif`

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Commitc53f738

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`‎config/test_quiet_include.h`

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