RISC-V: Put jump table in text for large code model

RISC-V: Put jump table in text for large code model

Large code model assume the data or rodata may put far away from
text section.  So we need to put jump table in text section for
large code model.

gcc/ChangeLog:

	* config/riscv/riscv.h (JUMP_TABLES_IN_TEXT_SECTION): Check if
	large code model.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/jump-table-large-code-model.c: New test.

(cherry picked from commit 1d9e02bb7e0af4f3d3eaaa1a0f4961970aba5560)