[elflib] Use smaller test data

I think the old test binaries were picked because they contained
zx_channel_write, which was a symbol of particular interest as we
developed the PLT support, but there's not really value in testing that
specifically, so let's use some tiny binaries (cowsay if you must know)
and make the tree smaller.

Change-Id: Ic7dea759f8554b6df8f5c109d88fd8ca2d6b4141
diff --git a/src/lib/elflib/elflib_unittest.cc b/src/lib/elflib/elflib_unittest.cc
index ea1783a..62a77ef 100644
--- a/src/lib/elflib/elflib_unittest.cc
+++ b/src/lib/elflib/elflib_unittest.cc
@@ -357,13 +357,10 @@
 
   auto plt = elf->GetPLTOffsets();
 
-  EXPECT_EQ(261U, plt.size());
+  EXPECT_EQ(2U, plt.size());
 
-  // We won't check every entry, but we'll grab a few representative ones.
-  EXPECT_EQ(0x1a4df0U, plt["_ZN3fxl10LogMessageC1EiPKciS2_"]);
-  EXPECT_EQ(0x1a4e50U, plt["_ZNSt3__218condition_variableD1Ev"]);
-  EXPECT_EQ(0x1a5a00U, plt["vprintf"]);
-  EXPECT_EQ(0x1a52b0U, plt["zx_channel_write"]);
+  EXPECT_EQ(0x15d0U, plt["printf"]);
+  EXPECT_EQ(0x15e0U, plt["strlen"]);
 }
 
 TEST(ElfLib, GetPLTFromStrippedDebug) {
@@ -379,12 +376,9 @@
 
   auto plt = elf->GetPLTOffsets();
 
-  EXPECT_EQ(261U, plt.size());
+  EXPECT_EQ(2U, plt.size());
 
-  // We won't check every entry, but we'll grab a few representative ones.
-  EXPECT_EQ(0x1a4df0U, plt["_ZN3fxl10LogMessageC1EiPKciS2_"]);
-  EXPECT_EQ(0x1a4e50U, plt["_ZNSt3__218condition_variableD1Ev"]);
-  EXPECT_EQ(0x1a5a00U, plt["vprintf"]);
-  EXPECT_EQ(0x1a52b0U, plt["zx_channel_write"]);
+  EXPECT_EQ(0x15d0U, plt["printf"]);
+  EXPECT_EQ(0x15e0U, plt["strlen"]);
 }
 }  // namespace elflib
diff --git a/src/lib/elflib/test_data/unstripped_example.elf b/src/lib/elflib/test_data/unstripped_example.elf
index 848bce1..99b2362 100755
--- a/src/lib/elflib/test_data/unstripped_example.elf
+++ b/src/lib/elflib/test_data/unstripped_example.elf
Binary files differ
diff --git a/src/lib/elflib/test_data/unstripped_example_stripped.elf b/src/lib/elflib/test_data/unstripped_example_stripped.elf
index 581a636..ac0ad69 100755
--- a/src/lib/elflib/test_data/unstripped_example_stripped.elf
+++ b/src/lib/elflib/test_data/unstripped_example_stripped.elf
Binary files differ