Replace pdb file used in llvm-symbolizer test with a smaller file.

[akhuang]

Summary

Reduce the size of the test-columns.pdb file from 6MB to 72KB by not
including standard libraries when building. Also update the instructions
for building the exe/pdb files.

context https://reviews.llvm.org/D81950#3692893

[nikic]

LGTM, thanks!

llvm/test/tools/llvm-symbolizer/pdb/Inputs/test.cpp

-// To generate the corresponding EXE/PDB, run:
-// cl /Zi test.cpp
-// To generate the PDB with column numbers, run:
-// clang-cl /Zi -gcolumn-info test.cpp
+// To generate the corresponding EXE/PDB (add -gcolumn-info for line columns):
+// clang -cc1 -triple x86_64-pc-windows-msvc -gcodeview -debug-info-kind=constructor -emit-obj test.cpp
+// lld-link test.obj -debug -entry:main
 
 namespace NS {
 struct Foo {
   void bar() {}
 };
 }
 
 void foo() {

llvm/test/tools/llvm-symbolizer/pdb/pdb-columns.test

-RUN: echo 0x140006BA0 > %t.input
-RUN: echo 0x140006C00 >> %t.input
-RUN: echo 0x140006BB0 >> %t.input
-RUN: echo 0x140006C10 >> %t.input
-RUN: echo 0x140006C20 >> %t.input
-RUN: echo 0x140006C30 >> %t.input
-RUN: echo 0x140006C40 >> %t.input
-RUN: echo 0x140006C70 >> %t.input
+RUN: echo 0x140001000 > %t.input
+RUN: echo 0x140001030 >> %t.input
+RUN: echo 0x140001010 >> %t.input
+RUN: echo 0x140001040 >> %t.input
+RUN: echo 0x140001050 >> %t.input
+RUN: echo 0x140001060 >> %t.input
+RUN: echo 0x140001070 >> %t.input
+RUN: echo 0x140001080 >> %t.input
 RUN:    llvm-symbolizer --obj="%p/Inputs/test-columns.exe" < %t.input \
 RUN:    | FileCheck %s
 
 This tests that the symbolizer outputs column info when it is present in the pdb.
 
 CHECK: foo(void)
 CHECK-NEXT: test.cpp:11:1
 CHECK: {{^private_symbol$}}