[lldb][RISCV] Fixed TestSymbolFileJSON for RISC-V (llvm#161497)

This test failed during testing on the RISC-V target because we couldn't
strip the main label from the binary. main is dynamically linked when
the -fPIC flag is enabled. The RISC-V ABI requires that executables
support loading at arbitrary addresses to enable shared libraries and
secure loading (ASLR). In PIC mode, function addresses cannot be
hardcoded in the code. Instead, code is generated to load addresses from
the GOT/PLT tables, which are initialized by the dynamic loader. The
reference to main thus ends up in .dynsym and is dynamically bound. We
cannot strip main or any other dynamically linked functions because
these functions are referenced indirectly via dynamic linking tables
(.plt and .got). Removing these symbols would break the dynamic linking
mechanism needed to resolve function addresses at runtime, causing the
executable to fail to correctly call them.

Author: sga-sc

lldb/test/API/functionalities/json/symbol-file/Makefile

@@ -1,4 +1,5 @@
 C_SOURCES := main.c
+CFLAGS_EXTRAS := -no-pie
 
 all: stripped.out