[Ada] Do not set Back_End_Inlining in ASIS mode

No impact on compilation.

2019-08-13  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* gnat1drv.adb (Adjust_Global_Switches): Do not set
	Back_End_Inlining in ASIS mode either.

From-SVN: r274342

gcc/ada/ChangeLog

+2019-08-13  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat1drv.adb (Adjust_Global_Switches): Do not set
+	Back_End_Inlining in ASIS mode either.
+
 2019-08-13  Olivier Hainque  <hainque@adacore.com>
 
 	* libgnat/s-win32.ads: Define size_t and fix the MapViewOfFile

gcc/ada/gnat1drv.adb

@@ -803,6 +803,10 @@ procedure Gnat1drv is
 
         not Generate_C_Code
 
+        --  No back-end inlining available in ASIS mode
+
+        and then not ASIS_Mode
+
         --  No back-end inlining in GNATprove mode, since it just confuses
         --  the formal verification process.