[lldb][test] - Update basic-elf.yaml to fix build bot.

D74764 (https://reviews.llvm.org/rG31f2ad9c368d47721508cbd0d120d626f9041715)
changed the behavior of the yaml2obj. Now it assigns virtual addresses
for allocatable sections.

SymbolFile/Breakpad/symtab.test started to fail after this change:
(http://lab.llvm.org:8011/builders/lldb-x86_64-debian/builds/5520/steps/test/logs/stdio)

Command Output (stderr):
--
/home/worker/lldb-x86_64-debian/lldb-x86_64-debian/llvm-project/lldb/test/Shell/SymbolFile/Breakpad/symtab.test:6:10: error: CHECK: expected string not found in input
# CHECK: Symtab, file = {{.*}}symtab.out, num_symbols = 5:
         ^
<stdin>:15:1: note: scanning from here
Symtab, file = /home/worker/lldb-x86_64-debian/lldb-x86_64-debian/build/tools/lldb/test/SymbolFile/Breakpad/Output/symtab.out, num_symbols = 6:
^
<stdin>:15:99: note: possible intended match here
Symtab, file = /home/worker/lldb-x86_64-debian/lldb-x86_64-debian/build/tools/lldb/test/SymbolFile/Breakpad/Output/symtab.out, num_symbols = 6:

For now I've updated the basic-elf.yaml so that now it produce the same layout as before D74764.
Breakpad/symtab.test should be updated it seems.

lldb/test/Shell/SymbolFile/Breakpad/Inputs/basic-elf.yaml

@@ -20,6 +20,14 @@ Sections:
     Address:         0x00000000004000B0
     AddressAlign:    0x0000000000000010
     Size:            0x42
+  - Name:            .dynsym
+    Type:            SHT_PROGBITS
+    Flags:           [ SHF_ALLOC ]
+    Address:         0x0
+  - Name:            .dynstr
+    Type:            SHT_STRTAB
+    Flags:           [ SHF_ALLOC ]
+    Address:         0x0
 Symbols:         
 DynamicSymbols:  
 ProgramHeaders: