libgcc: xtensa: fix build with -mtext-section-literals

libgcc/
2018-02-20  Max Filippov  <jcmvbkbc@gmail.com>

	* config/xtensa/ieee754-df.S (__adddf3_aux): Add
	.literal_position directive.
	* config/xtensa/ieee754-sf.S (__addsf3_aux): Likewise.

From-SVN: r257862

libgcc/ChangeLog

+2018-02-20  Max Filippov  <jcmvbkbc@gmail.com>
+
+	* config/xtensa/ieee754-df.S (__adddf3_aux): Add
+	.literal_position directive.
+	* config/xtensa/ieee754-sf.S (__addsf3_aux): Likewise.
+
 2018-02-14  Igor Tsimbalist  <igor.v.tsimbalist@intel.com>
 
 	PR target/84148

libgcc/config/xtensa/ieee754-df.S

@@ -55,6 +55,7 @@ __negdf2:
 
 #ifdef L_addsubdf3
 
+	.literal_position
 	/* Addition */
 __adddf3_aux:
 	

libgcc/config/xtensa/ieee754-sf.S

@@ -55,6 +55,7 @@ __negsf2:
 
 #ifdef L_addsubsf3
 
+	.literal_position
 	/* Addition */
 __addsf3_aux: