LoongArch: testsuite:Fix FAIL in file bind_c_array_params_2.f90.

On the LoongArch architecture, an error was found in the
bind_c_array_params_2.f90 file because there was no proper assembly code
for the regular expression detection function call, such as bl %plt(myBindC).

gcc/testsuite/ChangeLog:

	* gfortran.dg/bind_c_array_params_2.f90: Add code test rules to
	support testing of the loongArch architecture.

gcc/testsuite/gfortran.dg/bind_c_array_params_2.f90

@@ -2,6 +2,7 @@
 ! { dg-options "-std=f2008ts -fdump-tree-original" }
 ! { dg-additional-options "-mno-explicit-relocs" { target alpha*-*-* } }
 ! { dg-additional-options "-mno-relax-pic-calls" { target mips*-*-* } }
+! { dg-additional-options "-fplt -mcmodel=normal" { target loongarch*-*-* } }
 !
 ! Check that assumed-shape variables are correctly passed to BIND(C)
 ! as defined in TS 29913
@@ -16,7 +17,8 @@ integer :: aa(4,4)
 call test(aa)
 end
 
-! { dg-final { scan-assembler-times "\[ \t\]\[$,_0-9\]*myBindC" 1 { target { ! { hppa*-*-* s390*-*-* *-*-cygwin* amdgcn*-*-* powerpc-ibm-aix* *-*-ming* } } } } }
+! { dg-final { scan-assembler-times "\[ \t\]\[$,_0-9\]*myBindC" 1 { target { ! { hppa*-*-* s390*-*-* *-*-cygwin* amdgcn*-*-* powerpc-ibm-aix* *-*-ming* loongarch*-*-* } } } } }
+! { dg-final { scan-assembler-times "bl\t%plt\\(myBindC\\)" 1 { target loongarch*-*-* } } }
 ! { dg-final { scan-assembler-times "myBindC,%r2" 1 { target { hppa*-*-* } } } }
 ! { dg-final { scan-assembler-times "call\tmyBindC" 1 { target { *-*-cygwin* *-*-ming* } } } }
 ! { dg-final { scan-assembler-times "brasl\t%r\[0-9\]*,myBindC" 1 { target { s390*-*-* } } } }