[llvm-readobj][COFF] Improve extended DLL characteristics test (#151978)

Remove the need for the input binary by replacing it with a
yaml2obj-generated file.

Author: kkent030315

llvm/test/tools/llvm-readobj/COFF/Inputs/has-exdllcharacteristics.exe

@@ -0,0 +1,33 @@
+--- !COFF
+OptionalHeader:
+  AddressOfEntryPoint: 0
+  ImageBase: 0x180000000
+  SectionAlignment: 4096
+  FileAlignment: 512
+  MajorOperatingSystemVersion: 6
+  MinorOperatingSystemVersion: 0
+  MajorImageVersion: 0
+  MinorImageVersion: 0
+  MajorSubsystemVersion: 6
+  MinorSubsystemVersion: 0
+  Subsystem: IMAGE_SUBSYSTEM_WINDOWS_CUI
+  DLLCharacteristics: [ IMAGE_DLL_CHARACTERISTICS_HIGH_ENTROPY_VA, IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE, IMAGE_DLL_CHARACTERISTICS_NX_COMPAT, IMAGE_DLL_CHARACTERISTICS_TERMINAL_SERVER_AWARE ]
+  SizeOfStackReserve: 1048576
+  SizeOfStackCommit: 4096
+  SizeOfHeapReserve: 1048576
+  SizeOfHeapCommit: 4096
+  Debug:
+    RelativeVirtualAddress: 8192
+    Size:            56
+header:
+  Machine:         IMAGE_FILE_MACHINE_AMD64
+  Characteristics: [ IMAGE_FILE_EXECUTABLE_IMAGE, IMAGE_FILE_DLL, IMAGE_FILE_LARGE_ADDRESS_AWARE ]
+sections:
+  - Name:            .rdata
+    Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ ]
+    VirtualAddress:  8192
+    VirtualSize:     180
+    SectionData:     0000000091BE906800000000020000005500000058200000580400000000000091BE9068000000001400000004000000B0200000B0040000180000000380038000000000000000005020000008000000101000000300000052534453867E6BCADB53244591DEC582FAB540DB10000000433A5C55736572735C73756E675C446F63756D656E74735C636F64655C636574657865635C7836345C52656C656173655C636574657865632E706462000000008F000000
+    SizeOfRawData:   512
+symbols:         []
+...

llvm/test/tools/llvm-readobj/COFF/Inputs/has-exdllcharacteristics.yaml

@@ -1,9 +1,8 @@
 # To regenerate has-exdllcharacteristics.exe
 # $ echo int main() { return 0; } > has-exdllcharacteristics.c
-# To make minimum possible stub file (to decrease the binary size)
-# $ echo -n '4D5A00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' | xxd -r -p > stub
-# $ cl has-exdllcharacteristics.c /link /entry:main /STUB:stub /NOCOFFGRPINFO /EMITTOOLVERSIONINFO:NO /EMITPOGOPHASEINFO /NOVCFEATURE /MANIFEST:NO /cetcompat /cetcompatstrict /cetdynamicapisinproc /cetipvalidationrelaxed /hotpatchcompatible /functionpadmin:6
-RUN: llvm-readobj --coff-debug-directory %p/Inputs/has-exdllcharacteristics.exe | FileCheck %s
+# $ cl has-exdllcharacteristics.c /link /entry:main /cetcompat /cetcompatstrict /cetdynamicapisinproc /cetipvalidationrelaxed /hotpatchcompatible /functionpadmin:6
+RUN: yaml2obj %p/Inputs/has-exdllcharacteristics.yaml > %t.exe
+RUN: llvm-readobj --coff-debug-directory %t.exe | FileCheck %s
 
 CHECK:  DebugEntry {
 CHECK:    Characteristics: 0x0